Add sigmasig

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2018-04-12 18:42:39 +02:00
parent 324565e63c
commit b87c4a9de1
15 changed files with 605 additions and 128 deletions

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@ -233,7 +233,7 @@ Two examples of security game are given in Figure~\ref{fig:sec-game-examples}: t
\caption{Some security games examples} \label{fig:sec-game-examples}
\end{figure}
\index{Reduction!Advantage}
\index{Reduction!Advantage} \index{Encryption!IND-CPA}
The \indcpa{} game is an \emph{indistinguishability} game. Meaning that the goal for the adversary $\mathcal A$ against this game is to distinguish between two messages from different distributions.
To model this, for any adversary $\adv$, we define a notion of \emph{advantage} for the $\indcpa$ game as
\[
@ -255,6 +255,7 @@ The goal of the adversary is not to distinguish between two distributions, but t
Those signature queries are provided by an oracle \oracle{sign}{sk,\cdot}, which on input $m$ returns the signature $\sigma = \Sigma.\mathsf{sign}(sk, m)$ and add $\sigma$ to $\ensemble{sign}$. The initialization of these sets and the behaviour of oracle may be omitted in the rest of this thesis for the sake of readability.
\index{Signatures!EU-CMA}
For EU-CMA, the advantage of an adversary $\adv$ is defined as
\[
\advantage{\textrm{EU-CMA}}{\adv}(\lambda)